CN202832659U - Movable gas monitoring system based on precise locating of underground coal mine - Google Patents
Movable gas monitoring system based on precise locating of underground coal mine Download PDFInfo
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- CN202832659U CN202832659U CN 201220319545 CN201220319545U CN202832659U CN 202832659 U CN202832659 U CN 202832659U CN 201220319545 CN201220319545 CN 201220319545 CN 201220319545 U CN201220319545 U CN 201220319545U CN 202832659 U CN202832659 U CN 202832659U
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Abstract
The utility model discloses a movable gas monitoring system based on precise locating of an underground coal mine. The system comprises a movable gas detector used for detecting the concentration of gas, a wireless communication base station and a monitoring central server, wherein the position of the movable gas detector is determined through wireless communication between the movable gas detector and the wireless communication base station, the wireless communication base station can receive information related to the detected gas concentration, and the monitoring central server receives the detected gas concentration information from the wireless communication base station and the information related to the position of the movable gas detector to carry out information management. The movable gas detector is carried by personnel entering the mine, and the wireless communication station is arranged in the mine. By means of the structure and the method, the movable gas monitoring system can be used for safe monitoring management of daily production of the coal mine, guarantees safe production of the coal mine, provides a basis for disaster relief decisions of coal mine catastrophes, accelerates rescue process, and reduces casualties after the catastrophes.
Description
Technical field
The utility model relates to monitoring mining and the communications field, relates in particular to a kind of based on pinpoint mobile methane monitoring system and method under the coal mine.
Background technology
The gas explosion in underground coal mines accident belongs to the mine disaster, serious threat miner life security.In real time, effective monitoring mine gas density, and at the gas density alarm that transfinites, withdraw from the operating personnel and in time cut off the work plane electrical source of power, to preventing the gas explosion accident disaster positive effect is arranged.
Existing coal-mine gas monitoring method mainly utilizes the gas that is fixedly mounted in the coal mine roadway (namely, methane) Sensor monitoring tunnel gas density, by the outstation that places the down-hole monitor data is sent to the ground monitoring center, outstation is exported the order of cutting off the work plane power supply when gas exceeding limit.
But the shortcoming of this existing monitoring fire damp method is that sensor arranges that quantity is few, and coverage is little, and the time delay of face gas air-flow arrival sensor is long, is difficult to accomplish in real time effectively gas-monitoring.
Simultaneously, along with improved technical scheme has also appearred in the development of technology, for example: Chinese utility model patent " monitoring gas in mine method and system " (publication number CN1786422A) has proposed to gather the gas density data by the firedamp sensor on the mobile working unit, the method that this utility model provides be can not determine the position of mobile unit, the down well placement of the gas density of surveying is uncertain, can not implement effective monitoring to fire damp; In addition, Chinese utility model patent " coal-mine gas monitoring system comprising wireless sensor network " (publication number CN101446205A) has proposed the communication means between sensor network nodes and the cluster head, its sensor network nodes does not relate to the content of locating point position with dust and firedamp sensor yet; Also have, Chinese utility model patent " Novel down-hole gas positioning monitoring system " (CN201908690U) has been introduced a kind of gas monitor device and code identification device, monitoring gas density information exchange is crossed the gas monitoring system that wireless network, fiber-optic transceiver are transferred to Industrial Personal Computer (IPC), this system only can identify the coded message of gas monitor device, can not determine the place of the gas density that it monitors.
In the aforesaid prior art, owing to monitoring gas along with the personnel in the pit moves, therefore can not effectively detect near the gas density of underground work personnel, thereby can't guarantee the safety of working environment and can not effectively realize down-hole massive gas monitoring.In addition, owing to can't locate the position of gas indicator, the clear and definite place of mobile gas monitor just.
The utility model content
In view of this, the purpose of this utility model is to provide a kind of based on pinpoint mobile methane monitoring system and method under the coal mine of the position that can realize mobile gas density sensing and can determine the sensing gas density.
A kind of based on pinpoint mobile methane monitoring system under the coal mine according to embodiment of the present utility model comprises: the mobile gas indicator that is used for the sensing gas density; Determine the position of mobile gas indicator and receive radio communication base station about the information of the gas density of sensing by carrying out radio communication with mobile gas indicator; Receive from described radio communication base station described sensing gas density information and about the information of the position of described mobile gas indicator, to carry out the monitoring central server of information management, wherein, by the described mobile gas indicator that the personnel that enter mine carry, described radio communication base station is arranged at mine.
In addition, described mobile methane monitoring system, also comprise the power-down control device that transfinites, wherein, radio communication base station cuts off the power supply control information so that the described power-down control device that transfinites is carried out the outage control operation of the guarded region of mine to the described power-down control device output of transfiniting when the gas density that receives surpasses predetermined threshold.
In addition, described mobile methane monitoring system, comprise and the corresponding sub-monitor network of the monitored partition of mine, wherein, each sub-monitor network comprises by a plurality of radio communication base stations connected in series of communication interface separately, the bus communication device that is connected with a radio communication base station in described a plurality of radio communication base stations and the power-down control device that transfinites that is connected with any one radio communication base station in described a plurality of radio communication base stations, wherein, the radio communication base station of sub-monitor network communicates by bus communication device and described monitoring central server, wherein, the bus communication device of each sub-monitor network interconnects.
In addition, institute's radio communication base station is directly exported the outage control information to the described power-down control device that transfinites when the gas density that receives surpasses predetermined threshold, or exports the outage control information by other radio communication base station to the described power-down control device that transfinites.
In addition, described mobile gas indicator is arranged at the cap lamp of being worn by the personnel that enter mine.Described mobile gas indicator gives the alarm by the light fixture that drives cap lamp during greater than predetermined threshold in the gas density of sensing.Described mobile gas indicator is by the Power supply of described cap lamp.
In addition, described mobile gas indicator comprises: sensing gas density and the gas monitor alarm unit that gives the alarm by the light fixture that drives cap lamp during greater than predetermined threshold when the gas density of sensing; By carrying out the first less radio-frequency positioning unit that radio communication is carried out the location positioning of mobile gas indicator and the gas density of sensing sent to radio communication base station with radio communication base station.
In addition, described gas-warning unit comprises: the firedamp sensor of sensing gas density, the warning drive circuit that gives the alarm by the light fixture that drives cap lamp, control that described warning drive circuit gives the alarm during greater than predetermined threshold and the gas density of sensing is converted to the first controller of the gas density data of the signal of telecommunication when the gas density of sensing, described the first less radio-frequency positioning unit comprises antenna, receive the second controller of described gas density data from the first controller, under the control of second controller, carry out the radio frequency units that radio communication sends to radio communication base station with the gas density data and carries out the position measurement of mobile gas indicator by described antenna and radio communication base station.
In addition, described radio communication base station comprises: the RS485 communication interface that is used for the connection between the radio communication base station; By carrying out the second less radio-frequency positioning unit that radio communication receives gas density and carries out the position measurement of mobile gas indicator with mobile gas indicator; The gas density data that will receive from the second less radio-frequency positioning unit through the bus communication device by the RS485 communication interface and the position of mobile gas indicator offer the bus communication device, and when the gas density that receives surpasses predetermined threshold to the 3rd controller of the described power-down control device output alarm power cut-off information that transfinites.
In addition, described bus communication device is CAN bus communication device, and is connected to monitoring central server by being arranged at the outer CAN communication interface of mine.
In addition, described CAN bus communication device comprises: be used for to the essential safety source of radio communication base station power supply; Safety barrier; Integrated a plurality of CAN passages and be used for connecting the CAN bus hub of described CAN communication interface and other CAN bus communication device; The RS485/CAN converter, wherein, 485 ports of RS485/CAN converter are connected to the RS485 interface of radio communication base station by described safety barrier.
Provided by the utility model based on pinpoint mobile methane monitoring system and method under the coal mine, finish the mobile gas sensing of accurate location and site by the mobile gas indicator of movement that is arranged at the safety cap lamp that each miner wears, expanded the fire damp monitoring range, improved the gas monitor real-time, made gas monitor more reliable.In addition, system and method provided by the utility model can be realized full mine movable gas monitor and the pinpoint dual-use function of operating personnel, and the position of Real-Time Monitoring gas density is provided.In addition, radio communication base station can be realized gas exceeding limit, then on the spot outage control, also can carry out fast strange land outage control by associated base station, when having realized that " safety regulations in coal mine " middle getting working face and the distinguished and admirable middle gas density of other operating locations reach 1.5%, must quit work, cut off the electricity supply, withdraw from personnel's requirement, thereby avoid electric burning things which may cause a fire disaster to cause the regulation of gas explosion.
The mobile gas-monitoring method and system that the utility model proposes both can be used for the security monitoring management of the daily production in colliery, and guarantee work safety of coal mine production also for the decision-making of colliery catastrophe rescue provides foundation, is accelerated the rescue progress, casualties after the minimizing calamity.
Description of drawings
Fig. 1 is the block diagram that illustrates according to the mobile methane monitoring system of exemplary embodiment of the present utility model;
Fig. 2 is the block diagram that illustrates according to the mobile gas indicator that is arranged at cap lamp of exemplary embodiment of the present utility model;
Fig. 3 is the block diagram that illustrates according to the radio communication base station of exemplary embodiment of the present utility model;
Fig. 4 is the block diagram that illustrates according to the bus communication device of exemplary embodiment of the present utility model;
Fig. 5 is the flow chart based on pinpoint mobile gas-monitoring method under the coal mine that illustrates according to exemplary embodiment of the present utility model;
Fig. 6 is the flow chart based on the localization method of SDS-TWR that illustrates according to exemplary embodiment of the present utility model.
The specific embodiment
Now the utility model embodiment is described in detail, its example shown in the accompanying drawings, wherein, identical label represents same parts all the time.Below with reference to the accompanying drawings embodiment is described to explain the utility model.
In mobile methane monitoring system of the present utility model, the mobile gas indicator that is carried by the operating personnel who enters mine (hereinafter to be referred as " operating personnel ") comes the sensing gas density; Described mobile gas indicator carries out radio communication by the radio communication base station that is arranged at mine, and will offer described radio communication base station about the information of the gas density of sensing, described radio communication base station is by determining the position of described mobile gas indicator with the radio communication of described mobile gas indicator simultaneously; Radio communication base station will offer monitoring central server about the information of the gas density of sensing and about the information of the position of mobile gas indicator, to carry out the management of described information.
Fig. 1 is the block diagram that illustrates according to the mobile methane monitoring system of exemplary embodiment of the present utility model.As shown in Figure 1, the mobile methane monitoring system according to exemplary embodiment of the present utility model comprises mobile gas indicator 1, radio communication base station 2, the power-down control device 3 that transfinites, bus communication device 4 and monitoring central server 6.
The mobile gas indicator 1 that is used for the sensing gas density is carried by the operating personnel, the gas density around therefore can the sensing operating personnel, thus guarantee to demonstrate,prove the safety of working environment and realized down-hole massive gas monitoring.
Preferably, mobile gas indicator 1 can be arranged at the cap lamp that the operating personnel wears.In addition, mobile gas indicator 1 gives the alarm by the light fixture that drives cap lamp during greater than predetermined threshold in the gas density of sensing.Here, mobile gas indicator 1 is shared same power supply with described cap lamp, and namely mobile gas indicator 1 is powered by the power supply of described cap lamp.
After a while, describe to be arranged at the concrete structure of the mobile gas indicator of cap lamp in detail with reference to Fig. 2.
The radio communication base station 2 that is arranged at mine comes from the information of mobile gas indicator 1 reception about the gas density of sensing by carrying out radio communication with mobile gas indicator 1.When radio communication base station 2 surpasses described predetermined threshold in the gas density that receives, to the power-down control device 3 output outage control informations of transfiniting, to carry out the outage control operation of mine, can avoid thus electric burning things which may cause a fire disaster actuation gas.
In addition, radio communication base station 2 namely, is determined the position of mobile gas indicator 1 by carrying out the measurement that radio communication is carried out the position of mobile gas indicator 1 with mobile gas indicator 1.Describe the method that radio communication base station 2 is determined the position of mobile gas indicator 1 in detail with reference to Fig. 6 after a while.The radio communication MAC agreement here adopts time division multiple acess access (TDMA) agreement, and the localization method that adopts is based on the localization method of the symmetrical bilateral bidirectional ranging of SDS-TWR algorithm.After a while, describe localization method based on SDS-TWR in detail with reference to Fig. 6.
After a while, describe the concrete structure of radio communication base station in detail with reference to Fig. 3.
The power-down control device 3 that transfinites is used for the power supply of the guarded region of disconnection mine.Specifically, when the gas density that receives during greater than described predetermined threshold, radio communication base station 2 is to the power-down control device 3 output outage control informations of transfiniting, the power-down control device 3 that transfinites is carried out the outage control operation of mine after receiving the outage control information, thereby disconnects the power supply of the guarded region of mine.
Monitoring central server 6 receives about the information of the gas density that receives and about the information of the position of mobile gas indicator, so that these information are managed from radio communication base station 2.Specifically, monitoring central server 6 can store, inquire about, show the gas density of position, action trace and the site of underground operators, and links to each other with user terminal by the internet, thereby realizes the digitlization networking.Preferably, monitoring central server 6 shows the gas density of operating personnel position and position in modes such as tabulation, WEBGIS.
Bus communication device 4 is used for prolonging the communication distance of radio communication base station 2 and monitoring central server 6.Preferably, described bus communication device 4 is CAN bus communication device.Selectively, described bus communication device 4 can be the bus communication device that can prolong other type of communication distance.
In addition, as shown in Figure 1, CAN bus communication device 4 can be connected to monitoring central server 6 by being arranged at the outer CAN communication interface 5 of mine, to carry out wire communication with monitoring central server 6.
The concrete structure of bus communication device 4 is described with reference to Fig. 4 after a while.
In general, mine can comprise the monitored partition of a plurality of mines.Based on this, can comprise respectively and the corresponding a plurality of sub-monitor networks of the monitored partition of mine according to the mobile methane monitoring system of embodiment of the present utility model.
According to exemplary embodiment of the present utility model, each sub-monitor network comprises a plurality of radio communication base stations 2 connected in series, the bus communication device 4 that is connected with the first radio communication base station in described a plurality of radio communication base stations 2 and the power-down control device 3 that transfinites that is connected with the second radio communication base station in described a plurality of radio communication base stations 2.
Here, it should be noted that, the first radio communication base station refers to the radio communication base station that is connected with bus communication device 4 in a plurality of radio communication base stations, and the second radio communication base station refers to transfinite any one radio communication base station of power-down control device 3 of being connected in a plurality of radio communication base stations.As skilled in the art to understand, described the first radio communication base station and the second radio communication base station can be respectively a plurality of radio communication base stations, and the first radio communication base station and the second radio communication base station can be identical radio communication base stations.
Because the range for wireless communication of each radio communication base station is limited, when therefore in mine, radio communication base station 2 being set, the position that radio communication base station can suitable adjustment be set, so that no matter mobile gas indicator 1 is (namely, the operating personnel) wherein, mobile gas indicator can be communicated by letter with at least one radio communication base station 2.
In addition, because radio communication base station 2 formation in the sub-monitor network are connected in series, therefore can share the information of described positional information and gas density between the radio communication base station 2 in the sub-monitor network.Simultaneously, if determining gas density is not aforesaid the second wireless communication terminal that is connected to the power-down control device 3 that transfinites above the radio communication base station of predetermined threshold, then radio communication base station can be by the wire communication between the radio communication base station, send the strange land control command of cutting off the power supply to second wireless communication terminal, thereby finish power operation.
Can carry out the radio communication base station 2 of radio communication with mobile gas indicator 1 will be about the information of the gas density that receives and about the information of the position of the mobile gas indicator determined, be delivered to bus communication device 4 by a plurality of radio communication base stations connected in series with it, and through described bus communication device 4 described information be delivered to monitoring central server 6.Here, described a plurality of radio communication base station 2 is connected in series by the RS485 communication interface.That is, as shown in Figure 3, each radio communication base station 2 can comprise RS485 communication interface 23.Selectively, described radio communication base station can comprise the communication base station of other type, to be connected to each other between described a plurality of radio communication base stations.
In addition, the bus communication device 4 of each sub-monitor network interconnects as shown in Figure 1.
Below, describe the concrete structure of the mobile gas indicator that is arranged at cap lamp in detail in conjunction with Fig. 2.Mobile gas indicator 1 can comprise gas monitor alarm unit 11 and the first less radio-frequency positioning unit 12.
Gas monitor alarm unit 11 be used for the sensing gas density and when the gas density of sensing during greater than predetermined threshold the light fixture by the driving cap lamp give the alarm.Specifically, as shown in Figure 2, gas monitor alarm unit 11 can comprise: the firedamp sensor 111 of sensing gas density, the first controller 112 and the warning drive circuit 113 that gives the alarm by the light fixture (for example, cap lamp light fixture 14 shown in Figure 1) that drives cap lamp.
Whether the first controller 112 judges the gas density of sensing greater than described predetermined threshold, and controls described warning drive circuit 113 when the gas density of sensing during greater than described predetermined threshold and give the alarm.In addition, the first controller 112 is converted to the signal of telecommunication to send to radio communication base station 2 with the gas density of sensing.
The first less radio-frequency positioning unit 12 is carried out the location positioning of mobile gas indicator 1 and the gas density of sensing is sent to radio communication base station by carrying out radio communication with radio communication base station 2.Specifically, as shown in Figure 2, described the first less radio-frequency positioning unit 12 can comprise antenna 123, receive the second controller 122 of the gas density of the signal of telecommunication, 122 carries out the radio frequency units 121 that radio communication sends to radio communication base station with the information about the gas density of sensing and carries out the position measurement of mobile gas indicator by described antenna 123 and radio communication base station under the control of second controller 122 from the first controller.Here, described less radio-frequency positioning unit 121 can be based on the radio frequency units of NANOLOC.In addition, second controller 122 can be by the control of SPI Interface realization to radio frequency units 121.
In addition, as shown in Figure 2, described mobile gas indicator is powered by cap lamp battery 13.And described mobile gas indicator also can comprise can be by the cap lamp light fixture 14 of warning drive circuit 113 drivings.
Below, describe the concrete structure of radio communication base station in detail in conjunction with Fig. 3.
As shown in Figure 3, the radio communication base station 2 according to exemplary embodiment of the present utility model comprises the second less radio-frequency positioning unit 21, the 3rd controller 22, RS485 communication interface 23 and memory cell 24.
The second less radio-frequency positioning unit 21 can receive about the information of the gas density of sensing and carries out the position measurement of mobile gas indicator by carrying out radio communication with mobile gas indicator 1.Here, the second less radio-frequency positioning unit 21 has the structure corresponding with the first less radio-frequency positioning unit 12 of mobile gas indicator 1.
The 3rd controller 22 can will offer bus communication device 4 about the information of gas density with about the information of the position of mobile gas indicator from what the second less radio-frequency positioning unit 21 received by RS485 communication interface 23.In addition, the 3rd controller 22 can judge whether the gas density of reception surpasses predetermined threshold and (for example, pass through its IO mouth that has) to the described power-down control device 3 output alarm power cut-off informations that transfinite when the gas density that receives surpasses predetermined threshold.
In addition, the radio communication base station according to exemplary embodiment of the present utility model also can comprise the power supply unit 25 as secondary regulated power supply of being inputted by outside mining intrinsic safety power supply (for example, CAN bus communication device).
Below, describe the concrete structure of bus communication device 4 in detail in conjunction with Fig. 4, wherein, Fig. 4 shows the example that the bus communication device is CAN bus communication device.As skilled in the art to understand, the bus communication device is not limited to CAN bus communication device, can also use the bus communication device of other type.
In addition, as shown in Figure 1, CAN bus communication device 4 can be connected to monitoring central server 6 by being arranged at the outer CAN communication interface 5 of mine, to carry out wire communication with monitoring central server 6.
As shown in Figure 4, CAN bus communication device 4 comprises CAN bus hub 41, RS485/CAN converter 42, safety barrier 43 and essential safety source 44.
CAN bus hub 41 is integrated a plurality of CAN passages and be used for connecting described CAN communication interface 5 and other CAN bus communication device to be used for changing the CAN network topology structure, form the tree network that is suitable for the coal mine down-hole tunnel topological structure.
The RS485 port of described RS485/CAN converter 42 is connected to the RS485 interface 23 (with reference to Fig. 2) of radio communication base station 2 by described safety barrier 43.In addition, the CAN port of RS485/CAN converter 42 is connected on the CAN passage of CAN bus hub 41.
In addition, as shown in Figure 4, CAN bus communication device 4 according to exemplary embodiment of the present utility model also can comprise: AC/DC supply convertor 45 is used for electrical source of power under the coal mine is converted to direct current, with each functional unit power supply in CAN bus communication device 4; Reserve battery 46 is used for continuing to power to CAN bus communication device 4 each interior functional units after the well dynamic power interruptions.Here, reserve battery 46 can be selected the LiFePO4 ion rechargeable batteries.
Below, introduce according to exemplary embodiment of the present utility model based on pinpoint mobile gas-monitoring method under the coal mine.As mentioned above, can comprise based on pinpoint mobile gas-monitoring method under the coal mine according to exemplary embodiment of the present utility model: the mobile gas indicator 1 real-time sensing gas density of being carried by the personnel that enter mine; The information that radio communication base station 2 receives about the gas density of described sensing from mobile gas indicator 1 by radio communication, and by determining the position of mobile gas indicator 1 with the radio communication of described mobile gas indicator 1; Monitoring central server 6 receives about the information of the gas density of sensing and about the information of the position of mobile gas indicator, to carry out information management from described radio communication base station 2 by wire communication.
In addition, according to exemplary embodiment of the present utility model based on pinpoint mobile gas-monitoring method under the coal mine, when gas density surpasses predetermined threshold, give the alarm, for example, when gas density surpasses predetermined threshold, carry out the outage control operation of mine.In addition, if described mobile gas indicator is arranged at the cap lamp of being worn by the personnel that enter mine, then described mobile gas indicator gives the alarm by the light fixture that drives cap lamp during greater than described predetermined threshold in the gas density of sensing.
Below, in conjunction with Fig. 5 describe in detail according to exemplary embodiment of the present utility model based on pinpoint mobile gas-monitoring method under the coal mine.
Step S110: will be arranged at the mobile gas indicator 1 of the safety cap lamp that the personnel that enter mine wear as mobile node, the radio communication base station 2 that is arranged under the mine is made up cordless communication network as fixed contact.
Step S120: adopt wire communication between the radio communication base station 2, thereby be connected to monitoring central server 6, thereby form full mine gas monitoring system.
Step S130: be arranged at the mobile gas indicator 1 real-time sensing gas density of safety cap lamp, and when gas density transfinited, mobile gas indicator 1 sent warning by the light flash that makes safety cap lamp.
Step S140: radio communication base station 2 carries out radio communication with mobile gas indicator 1 and finishes the range finding location, thereby obtains the information of the position of mobile gas indicator 1, the information that receives about the gas density of sensing from mobile gas indicator 1 simultaneously.The radio communication MAC agreement here adopts time division multiple acess access (TDMA) agreement, and the localization method that adopts is based on the localization method of the symmetrical bilateral bidirectional ranging of SDS-TWR algorithm.After a while, describe localization method based on SDS-TWR in detail with reference to Fig. 6.
Step S150: radio communication base station 2 stored position informations and about the information of gas density, and send to monitoring central server 6 by wire communication with positional information with about the information of gas density.
Step S160: radio communication base station 2 judges whether gas density surpasses predetermined threshold, and the local outage of output control command when gas density surpasses predetermined threshold, or send the strange land control command of cutting off the power supply to associated base station, thereby cut off the work plane electrical source of power.
Step S170: monitoring central server 6 processing, stored position information and about the information of gas density, data terminal shows the gas density information of personnel positions and position with tabulation, WEBGIS mode.
Below, in conjunction with Fig. 6 distance-finding method based on radio communication is described.
The localization method of the symmetrical bilateral bidirectional ranging of described SDS-TWR algorithm is to utilize the intrinsic range measurement principle of NANOLOC chip to realize range finding location between mobile gas indicator and the radio communication base station.For convenience of description, represent mobile gas indicator with the A node, represent radio communication base station with the B node, its range finding positioning step is:
At step S210, i.e. T
1Time point, node A sends packet (Data) to Node B.
At step S220, i.e. T
2Time point, Node B are received the packet that node A sends.
At step S230, i.e. T
3=T
2+ T
ReplyBTime point, Node B send to node A confirms bag (ACK).
At step S240, i.e. T
4=T
1+ T
RoundATime point, A node are received the affirmation bag that the B node sends.
At step S250, i.e. T
5Time point, B node send packet to the A node again.
At step S260, i.e. T
6Time point, A node are received the packet that the B node sends.
At step S270, i.e. T
7=T
6+ T
ReplyATime point, A node send to the B node confirms bag.
At step S280, T
8=T
5+ T
RoundBTime, the B node is received the affirmation bag that the A node sends.
At step S290, calculate between A node and the B node distance between time of sending data and at 2 in Node B.
Time is T
d=1/4 (T
RoundA-T
ReplyA+ T
RoundB-T
ReplyB)
Distance between A node and the B node is: d=vT
d=v/4 (T
RoundA-T
Reply+ T
RoundB-T
ReplyB).
V is the propagation rate of electric wave, the i.e. light velocity in the above-mentioned formula.
Provided by the utility model based on pinpoint mobile methane monitoring system and method under the coal mine, finish the gas sensing of accurate location and site by the mobile gas indicator that is arranged at the safety cap lamp that each miner wears, expanded the fire damp monitoring range, improved the gas monitor real-time, made gas monitor more reliable.In addition, system and method provided by the utility model can be realized full mine movable gas monitor and the pinpoint dual-use function of operating personnel, and the position of Real-Time Monitoring gas density is provided.In addition, radio communication base station can be realized the gas exceeding limit control of cutting off the power supply on the spot, also can carry out rapidly strange land outage control by associated base station, when having realized that " safety regulations in coal mine " middle getting working face and the distinguished and admirable middle gas density of other operating locations reach 1.5%, must quit work, cut off the electricity supply, withdraw from personnel's requirement, avoid electric burning things which may cause a fire disaster to cause the regulation of gas explosion.
The mobile gas-monitoring method and system that the utility model proposes both can be used for the security monitoring management of the daily production in colliery, and guarantee work safety of coal mine production also for the decision-making of colliery catastrophe rescue provides foundation, is accelerated the rescue progress, casualties after the minimizing calamity.
Although represented and described embodiment more of the present utility model, but those skilled in the art should understand that, in the situation that does not break away from the principle of the present utility model that limited its scope by claim and equivalent thereof and spirit, can make amendment to these embodiment.
Claims (12)
1. one kind based on pinpoint mobile methane monitoring system under the coal mine, it is characterized in that comprising:
The mobile gas indicator that is used for the sensing gas density;
Determine the position of mobile gas indicator and receive radio communication base station about the information of the gas density of sensing by carrying out radio communication with mobile gas indicator;
Receive from described radio communication base station described sensing gas density information and about the information of the position of described mobile gas indicator, carrying out the monitoring central server of information management,
Wherein, by the described mobile gas indicator that the personnel that enter mine carry, described radio communication base station is arranged at mine.
2. mobile methane monitoring system as claimed in claim 1 is characterized in that, also comprises the power-down control device that transfinites,
Wherein, radio communication base station cuts off the power supply control information so that the described power-down control device that transfinites is carried out the outage control operation of the guarded region of mine to the described power-down control device output of transfiniting when the gas density that receives surpasses predetermined threshold.
3. mobile methane monitoring system as claimed in claim 2 is characterized in that comprising and the corresponding sub-monitor network of the monitored partition of mine,
Wherein, each sub-monitor network comprises by a plurality of radio communication base stations connected in series of communication interface separately, the bus communication device that is connected with a radio communication base station in described a plurality of radio communication base stations and the power-down control device that transfinites that is connected with any one radio communication base station in described a plurality of radio communication base stations
Wherein, the radio communication base station of sub-monitor network communicates by bus communication device and described monitoring central server,
Wherein, the bus communication device of each sub-monitor network interconnects.
4. mobile methane monitoring system as claimed in claim 3, it is characterized in that radio communication base station when the gas density that receives surpasses predetermined threshold directly to the described power-down control device output outage control information of transfiniting, or by other radio communication base station to the described power-down control device output outage control information of transfiniting.
5. mobile methane monitoring system as claimed in claim 3 is characterized in that, described mobile gas indicator is arranged at the cap lamp of being worn by the personnel that enter mine.
6. mobile methane monitoring system as claimed in claim 5 is characterized in that, described mobile gas indicator gives the alarm by the light fixture that drives cap lamp during greater than predetermined threshold in the gas density of sensing.
7. mobile methane monitoring system as claimed in claim 5 is characterized in that, described mobile gas indicator is by the Power supply of described cap lamp.
8. mobile methane monitoring system as claimed in claim 5 is characterized in that, described mobile gas indicator comprises:
Sensing gas density and the gas monitor alarm unit that gives the alarm by the light fixture that drives cap lamp during greater than predetermined threshold when the gas density of sensing;
By carrying out the first less radio-frequency positioning unit that radio communication is carried out the location positioning of mobile gas indicator and the gas density of sensing sent to radio communication base station with radio communication base station.
9. mobile methane monitoring system as claimed in claim 8, it is characterized in that, described gas-warning unit comprises: the firedamp sensor of sensing gas density, the warning drive circuit that gives the alarm by the light fixture that drives cap lamp, control the first controller that described warning drive circuit gives the alarm and the gas density of sensing is converted to the gas density data of the signal of telecommunication during greater than predetermined threshold when the gas density of sensing
Described the first less radio-frequency positioning unit comprises antenna, receives the second controller of described gas density data, carries out the radio frequency units that radio communication sends to radio communication base station with the gas density data and carries out the position measurement of mobile gas indicator by described antenna and radio communication base station under the control of second controller from the first controller.
10. mobile methane monitoring system as claimed in claim 3 is characterized in that, described radio communication base station comprises:
The RS485 communication interface that is used for the connection between the radio communication base station;
By carrying out the second less radio-frequency positioning unit that radio communication receives gas density and carries out the position measurement of mobile gas indicator with mobile gas indicator;
The gas density data that will receive from the second less radio-frequency positioning unit through the bus communication device by the RS485 communication interface and the position of mobile gas indicator offer the bus communication device, and when the gas density that receives surpasses predetermined threshold to the 3rd controller of the described power-down control device output alarm power cut-off information that transfinites.
11. mobile methane monitoring system as claimed in claim 3 is characterized in that, described bus communication device is CAN bus communication device, and is connected to monitoring central server by being arranged at the outer CAN communication interface of mine.
12. mobile methane monitoring system as claimed in claim 11 is characterized in that, described CAN bus communication device comprises:
Be used for to the essential safety source of radio communication base station power supply;
Safety barrier;
Integrated a plurality of CAN passages and be used for connecting the CAN bus hub of described CAN communication interface and other CAN bus communication device;
The RS485/CAN converter,
Wherein, 485 ports of RS485/CAN converter are connected to the RS485 interface of radio communication base station by described safety barrier.
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| CN 201220319545 CN202832659U (en) | 2012-07-02 | 2012-07-02 | Movable gas monitoring system based on precise locating of underground coal mine |
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| CN 201220319545 CN202832659U (en) | 2012-07-02 | 2012-07-02 | Movable gas monitoring system based on precise locating of underground coal mine |
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| CN202832659U true CN202832659U (en) | 2013-03-27 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102733855A (en) * | 2012-07-02 | 2012-10-17 | 北京奥普恒泰科技有限公司 | Mobile gas monitoring system and method based on accurate positioning in underground coal mine |
| CN105822350A (en) * | 2016-04-13 | 2016-08-03 | 孙欣 | Mining underground safety monitoring system based on RFID positioning |
| CN105840240A (en) * | 2016-04-13 | 2016-08-10 | 孙欣 | Mining downhole safety monitoring system based on mobile equipment |
| CN105863732A (en) * | 2016-04-13 | 2016-08-17 | 孙欣 | Mining underground safety monitoring system based on smart mask |
| CN106375388A (en) * | 2016-08-29 | 2017-02-01 | 辽宁工程技术大学 | Big data-based gas monitoring data wireless transmission and alarm device and method |
| CN106640200A (en) * | 2017-03-09 | 2017-05-10 | 中国矿业大学(北京) | Coal mine downhole sensor positioning and warning system |
| CN107600113A (en) * | 2017-08-25 | 2018-01-19 | 武汉理工大学 | A kind of mobile device personnel are close to monitor and alarm system and method |
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2012
- 2012-07-02 CN CN 201220319545 patent/CN202832659U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102733855A (en) * | 2012-07-02 | 2012-10-17 | 北京奥普恒泰科技有限公司 | Mobile gas monitoring system and method based on accurate positioning in underground coal mine |
| CN102733855B (en) * | 2012-07-02 | 2015-05-20 | 北京奥普恒泰科技有限公司 | Mobile gas monitoring system and method based on accurate positioning in underground coal mine |
| CN105822350A (en) * | 2016-04-13 | 2016-08-03 | 孙欣 | Mining underground safety monitoring system based on RFID positioning |
| CN105840240A (en) * | 2016-04-13 | 2016-08-10 | 孙欣 | Mining downhole safety monitoring system based on mobile equipment |
| CN105863732A (en) * | 2016-04-13 | 2016-08-17 | 孙欣 | Mining underground safety monitoring system based on smart mask |
| CN106375388A (en) * | 2016-08-29 | 2017-02-01 | 辽宁工程技术大学 | Big data-based gas monitoring data wireless transmission and alarm device and method |
| CN106640200A (en) * | 2017-03-09 | 2017-05-10 | 中国矿业大学(北京) | Coal mine downhole sensor positioning and warning system |
| CN107600113A (en) * | 2017-08-25 | 2018-01-19 | 武汉理工大学 | A kind of mobile device personnel are close to monitor and alarm system and method |
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